Pipe cutter



March 15, 1932. J. B. GALBRAITH PiPE CUTTER Filed Nov. 26, 1928 Mum/.

Par sisal Man 15; 1932 [JOSEPH GALBRAIYITH, 6P cassette, eta-a I PIPE Application filed November 26;1 S2T8. Serial-No. 325,068? i V Myinvention relates to pipe cutters aha has for its object to provide a new: and 'effi cient device for cutting pipes when used in a rotary type of pipe handling machine.

A further object is to provide a new and eificient, cutting off tool which can beused either in cutting pipe orother similar'material in pipe handling machines or in cutting off material rotated by lathes.

A still further object is to provide a pipe cutting tool which may be used on any machine and which will not dull the cutting'tool from much usage, thereby giving greater life to the cutting tools and eliminatingexpense to the operator. s I s 5 These objects I accomplish with the device illustrated in the accompanying drawings in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the accompanying specification and pointed out in the appended claims. n r In the drawings in which I have shown the best and most preferredemanneriof' building my invention,

Figure 1 is a side elevation of the cutterin use.

thereof. Figure 3 is. a modified fOIIIl'O'f constructing the adjusting plate. Figure 4: l 1of Figure 1. Figis a'section on line ure 5 is a section on 1ine'55 of Figure 1.

In thedrawings I have shown the pipe being cut as A, the main frame of thecutter as B, andthe cutter blade as C. Thecutter frame Bis made of a piece of metal castinto the shape shown inthe'drawings. One end 1 thereof is formed downwardly to provide a bearing for a feed screw 12, and the medial portion of the casting is formed downwardly into a blade supporting portion 2, and a slanting cut 4: is made therein, in which the cutting blade C is placed. The cutting blade is held in place by t screws 6. I Near one end of the said frame B, I provide a boss 7 which is bored to receivea pivot pin 8 and a gauge bar 9 is pivoted thereto. The said gauge bar 9 is provided with a wearing'plate 10 on the under side thereof and a guide and support frame 11 is formed on the bottom of the frame B, to

guide the bar 9- and-the plate 10 and said I said screw Figure 2 is a plan view;

he plate 5 and the tap frame bored and to and aid in supporting the feed-screw 12;;"The

said support frame 1:1;i's channelled: at 114,:to

receive: the bar 9 and a jguide-plateflifiwis see therein-and to form Eo'neside gof' the-guide 11 x and is. adapted tb be. screwed? infeither direction ,therethrou-glnto; adjust. the tension the; pipe is being cut off; 'An-adjustingg screw ;15,1is placed throughi'a threaded hole through the main frame B and .at, right "cured, onone side-thereofpto hold the: bar ,9, I

@frafme, 11.Th'e feed "screw 12 is placed. through a threaded'hole in the end of theend I land a hole-11a in the; end offthe guide frame f I an 1 of :the cutter blade 0; in the pipe A, when I angles to the screw 12. .Theend. 16 of-the is enlarged and rests upon the top.

side of the gauge bar 9 to force thefbarfi I downwardly or to allow it to move upwardly depending upon the size :of the pipe'being .cu-t off.v vGraduations '17 are formed onthe side of the portion 2' and a, finger .j18;4iS,se-'

adjusted down or upv by theirnovementof the screw 15, the a g'raduations, on y. the portion 2 indicate the size of pipe which the plate lQ will frest" upon andltheesize Qqifpijpegwhich canbe cut ateach position of theplate llfl;

HandlesIQOIaiid 21 are provided on the free ends of the screws 12 and 15 respectively to provide means for rotating the screws. Fig: ure 3 is a modified form of constructing the cutter with the bar 9 suspended in the guide 11 and in a groove cut in the face of the portion 2, with the channel 14 in the guide 11 shorter than inthe other type cutter so that the bottom of the cut will act as a pivot point for the bar 9. The outer free end 27 of the body B is outwith an elongated slot 23 and a bolt Q l'is passed therethroughand said bolt is secured in a bearing block 25. The

length to keep the tool from tipping; when a pipe is being cut off, and the slot 23; prosaid bearing block 25 is made of sufiicient v vides for the entire cutter being adjustable 1 longitudinally. A support bar 26 maybe either a part of the machine on which the cutter is being used or the block 25 may be grooved on the bottom side as shown in Figure 3, and the block may then rest upon the bar Without encircling it. In some types of cutting the block 25 may be dispensed with entirely and the end 27 of the body B rested upon any suitable support. I

The operation of my cutter is as follows: The cutter is placed on the bar 26 and then lowered down on the'pipe to be cut. The gauge bar 9 is then adjusted by the screw 15 to the size of the pipe, and the device drawn to the pipe so that the cutting blade C is touching the outer periphery thereof, byrotating the screw 12. The pipe may then be rotated and as it rotates the operator gradually turns the screw 12 drawing the cutting blade G into thework, and the screw 15 may be turned as necessary to keep the cutter in the best cutting angle to the pipe. It will be obvious that the cutter could also be rotated around the pipe and the pipe held stationary Having thus described my invention I desire to secure by Letters Patent and claim: 7 1; In a cutter the combination of a body member; a cutting blade carried in a support thereon; guides depending from said body member to support a feed screw; a gauge bar: pivoted under body member having a wearing plate secured thereon; and an adjustment screw passed through said body member and bearing upon the top side of said gauge bar to adjust the gauge bar to support the entire device above the work so that the cutter blade is at the correct angle to the-work being done.

2. In a cutter the combination of a body; a cutting blade and a gauge barsupported thereunder; and adjustment screws adapted to draw the blade to the work, all arranged to engage the work at spaced points around the perimeter thereof and to retain the same correlative positions upon adjustments being made thereto. 7

In testimony whereof I have aifixed my signature.

JOSEPH B. GALBRAITH. 

